Lifetime measurement and aging mechanism analysis of OLED subpixels

The lifetime of organic light-emitting diodes (OLED) is of great importance for both display and lighting ap-plications. In order to measure the brightness attenuation of each subpixel on the OLED screen at the same time, an experimental platform was built with a spectrometer and an automatic mechanical system. By testing the brightness decay rate of red, green, blue, and white light from the OLED screen under different initial brightness, combined with data fitting using the extended exponential decay model, the aging mechanism of each subpixel is compared and analyzed. The comparative analysis results show that the lifetime of the OLED obeys an expo-nential decay distribution, and which of the blue light has the fastest decay rate within a reasonable time range. These testing and analysis methods could provide reference and guidance for OLED manufacturers and users.

Automated summary

This study established an experimental platform to measure the brightness attenuation of each subpixel on the OLED screen using a spectrometer and an automatic mechanical system. Analysis of the data revealed that blue light has the fastest decay rate. These findings provide reference and guidance for OLED manufacturers and users.